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    console.log(Array.__proto__); //本地方法 构造 ƒ () { [native code] } 本地的方法构造
    let arr = new Array();
    console.log(arr.__proto__); //Array.prototype 原型
    let obj = new Object();
    console.log(obj.__proto__); //Object.prototype 原型
    //自定义的函数 Person 类似 Array
    function Person(){

    }
    let p = new Person();
    console.log(Person.__perto__);  //undefined 
    console.log(p.__proto__);  //Object.prototype 构造
    
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